London Buses operates a bus from Hammersmith to Westminster every 10 minutes. Tickets cost $3 and the journey takes 27 min. Green Line (operated by First in Berkshire) also services this route every 30 minutes.
From Hammersmith (Dist&Picc Line) Underground Station Tube to Victoria Underground Station. 14 min £2. From Hammersmith Bus Station bus to Hyde Park Corner. 27 min £2. From Hammersmith taxi to Westminster. 10 min £21. From Hammersmith Uber to Westminster. 10 min £10. From Hammersmith walk to Westminster. 1 h 19 min. From Hammersmith Road, Hammersmith Bikeshare to Howick Place, Westminster. 31 min.